JP2000158561A - Tubular film perforating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable only one of the faces of a flat tubular film of a doubly lapped film form to be perforated. SOLUTION: A conveying path 5 for conveying a long-size tubular film 2 is provided and at the same time, a cutting means 7 is provided which moves to the conveying path 5, synchronized with the intermittent feed of the film 2 and comes into contact with the film 2 to form notched holes of a specified shape in the film 2. In addition, an underlay member 13 formed of a magnetizable material is inserted under the film 2 positioned opposite to the cutting means 7, and is retained at a specified position opposite to the cutting means 7 from the outside of the film 2 with the help of a retaining means 14 consisting of a magnet 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a flexible container made of a film, for example, a flexible container suitable for filling a fluid such as water, a liquid seasoning, and a paint. The present invention relates to a device for punching a tubular film.

[0002]

2. Description of the Related Art A flexible container as described above is flat when not in use, but has a rectangular parallelepiped shape when filled with a fluid, and is stably accommodated in a cardboard box or the like. The container is formed with a spout projecting from an outer case such as a cardboard box. In order to form the spout, first, a hole is formed in the film-like body, and a spout forming member is attached thereto. . So that the hole can be made
One film is used. However, the use of only one film complicates the manufacturing process, lowers the efficiency, and increases the welding allowance, so that there is a problem in strength.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a technique which enables a flexible container to be manufactured using a tubular film.

Means for this purpose are to provide a transport path for transporting a long tubular film, move relative to the transport path in synchronism with the intermittent feeding of the film, and contact the film to contact the film. A cutting means for forming a notch of a predetermined shape is provided, and an underlay member formed of a magnetizable material is inserted into a film opposed to the cutting means. Is a device for piercing a tubular film that is held at a predetermined position facing the cutting means from outside.

[0005] When the film has a flat shape having a folded portion that is folded inward at both side edges, the underlay member may be formed to have an H-shaped cross section.

It is preferable that the magnets of the holding member are arranged on both front and back sides of the underlay member.

[0007]

According to the above construction, when the film is transported intermittently on the transport path and stopped, the cutting means hits the film by the relative movement between the film and the cutting means. At this time, since the underlay member facing the cutting means is provided in the film via one side of the film, a notch hole of a predetermined shape is formed only on one side of the film, that is, only on one side. Moreover, since the underlay member is held at a predetermined position by the holding means made of a magnet, the underlay member does not move in the direction of the relative movement with the cutting means, nor does it move in the direction of the transport path, for example, by cutting the film. A reliable hole can be expected without losing it.

As described above, even in the case of a tubular film, a cutout hole can be formed only on one side, so that in the production of a flexible container, both ends of the film after the punching are formed by fusing. It may be cut into a large size and sealed, and then a spout member may be attached to the opened notch. Therefore, the manufacturing process is simplified, the efficiency is improved, and the strength and performance can be improved as compared with the conventional flexible container.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of a flexible container 1. The flexible container 1 is flat, but when it is filled with a liquid, it becomes a rectangular parallelepiped and is stable when put in a case such as a cardboard box. This flexible container 1 is formed from a flat tubular film 2 made of resin (hereinafter, referred to as a film),
In manufacturing, in order to mount the spout member 3, it is necessary to make a round cutout hole in the film 2 as shown by a virtual line in FIG.

The film 2 is a flat tube having folded portions 2b, 2b which are folded inward on both side edges, and the cutout hole 2a must be formed only on one side.

Therefore, a drilling device 4 (hereinafter, referred to as a device) as shown in FIG. 3 is used. The apparatus 4 is provided in a conveying path 5 for conveying the long film 2 having the above-described shape and in the vicinity thereof. The film is conveyed by the rollers 6 and is intermittently fed so as to make holes at predetermined intervals in the length direction of the film 2. Then, the cutter 8 of the cutting means 7 advances and retreats with respect to the film 2 to be conveyed, so that the round notch 2a is formed in the film 2 as described above.

The cutting means 7 has at its tip a round cylindrical cutter 8 having a size corresponding to the hole to be drilled, and a heater 9 for heating the cutter 8 is attached to the cutter 8. A suction path 10 having a vacuum means (not shown) at the end is formed on the rear side of the heater 9 so that the cutter 8 advances and retreats to a position where the cutter 8 contacts the film 2 together with the suction path 10. I have.

That is, the cutter 8, the heater 9, and the suction path 10
Is supported on the base 11 so as to be capable of moving forward and backward, and is driven by a cylinder 12 provided at the rear end of the base 11.

The film 2 facing the cutting means 7
An underlay member 13 formed of a magnetized material is inserted into the inside.

For the underlay member 13, a material having heat resistance is selected because the perforation is caused by fusing. For example, it is formed of iron, and its shape is formed in an H-shaped cross section as shown in FIG. Thereby, the film 2 having a unique shape can be evenly conveyed without shifting between the front and back.

In order to reduce the weight of the underlaying member 13,
The main body may be formed of a heat-resistant resin, and an iron plate may be inserted therein, or the surface of the main body may be covered with a thin iron plate.

The underlay member 13 is held by a holding means 14 at a predetermined position facing the cutting means 7 from outside the film 2.

The holding means 14 holds both side surfaces of the underlay member 13 by the magnetic force of the magnet. The holding means 14 supports the two receiving plates 15, 15 supported at predetermined positions opposed to each other via the transfer path 5. The magnet 16 is fixed to the side surface. Magnet 16
For example, a rod-shaped member may be used and disposed at both ends in the transport direction as shown in the figure. When the film 2 is fed by the rollers 6, the film 2 passes through the space between the underlay member 13 and the magnet 16 so as to pass through.

The receiving plate 15 on the cutting means 7 side is formed with a notch 15a for allowing the cutter 8 to advance and retreat.
Further, a magnet having a magnetic force that firmly holds the underlay member 13 and does not hinder the conveyance of the film 2 is used as the magnet 16. The surface of the magnet 16 may be coated with a resin or the like in order to improve the sliding with the film 2. The magnet 16 may be formed with an engaging portion that engages with the transport-side end of the underlay member 13 so that the underlay member 13 can be reliably prevented from moving as the film 2 is transported.

In order to make a hole in the film 2 with the apparatus 4 configured as described above, when the film 2 is conveyed on the conveying path 5 by intermittent feeding and stops, the cylinder 1 of the cutting means 7 is stopped.
The drive unit 2 advances the advance / retreat portion, and brings the heated cutter 8 into contact with the film 2 to melt it. At this time, since the underlay member 13 which faces the cutting means 7 via one side of the film 2 is provided in the film 2, the film 2 has a notch hole of a predetermined shape only on one side, that is, only on one side. 2a is burned.

After drilling, the cylinder 12 is driven to retract the cutter 8 to the original position, and the cut-out piece 2c is sucked and removed by driving the vacuum means. Then, the film fed on the transport path 5 is sequentially processed by a fusing device (not shown) and a spout member mounting device (not shown).

As described above, even in the case of the tube-shaped film 2, the notch holes can be formed only on one side, so that in manufacturing the flexible container 1, both ends of the film 2 after the hole are cut. It is sufficient to cut and seal to a predetermined size by fusing, and then to attach a spout member to the opened notch, thereby simplifying the manufacturing process and improving efficiency. Moreover, since the number of parts to be sealed can be reduced, the strength and performance can be improved as compared with the conventional flexible container.

Since the underlay member 13 is held at a predetermined position by the holding means 14 composed of the magnet 16, the underlay member 13 can not only move in the direction of movement relative to the cutting means 7 but also in the transport direction. For example, reliable drilling can be expected without accidentally cutting the film.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flexible container.

FIG. 2 is a perspective view of a tubular film.

FIG. 3 is a configuration diagram of a drilling device.

FIG. 4 is a sectional view of a tubular film and an underlay member.

FIG. 5 is an explanatory diagram of an operation state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Tubular film 2a ... Notch hole 2b ... Folding part 4 ... Drilling device 5 ... Conveying path 7 ... Cutting means 13 ... Underlay member 14 ... Holding means 16 ... Magnet

Claims (3)

[Claims] 1. A transport path for transporting a long tubular film is provided, and relative to the transport path in synchronization with intermittent feeding of the film, the film is brought into contact with the film and has a predetermined shape. A cutting means for forming a notch hole is provided, and an underlay member formed of a magnetizable material is inserted into a film facing the cutting means, and the underlay member is held from the outside of the film by a holding means made of a magnet. An apparatus for piercing a tubular film held in a predetermined position facing the cutting means. 2. The tubular film according to claim 1, wherein said film has a flat shape having folded portions turned inward at both side edges thereof, and said underlay member has an H-shaped cross section. Drilling device. 3. The apparatus for punching a tubular film according to claim 1, wherein the magnets of the holding member are arranged on both front and back sides of the underlay member.